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US20160249037A1 - Method for acquiring comfort degree of motion-sensing binocular stereoscopic video - Google Patents

Method for acquiring comfort degree of motion-sensing binocular stereoscopic video Download PDF

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US20160249037A1
US20160249037A1 US15/026,576 US201315026576A US2016249037A1 US 20160249037 A1 US20160249037 A1 US 20160249037A1 US 201315026576 A US201315026576 A US 201315026576A US 2016249037 A1 US2016249037 A1 US 2016249037A1
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comfort degree
vxy
degree value
calculating
video
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US10091484B2 (en
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Shimin Hu
Songpei DU
Masia BELEN
Gutierrez DIEGO
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Tsinghua University
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    • H04N13/0033—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
    • H04N13/106—Processing image signals
    • H04N13/144—Processing image signals for flicker reduction
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • H04N13/0436—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/339—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using spatial multiplexing
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10016—Video; Image sequence
    • G06T2207/10021—Stereoscopic video; Stereoscopic image sequence
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30168—Image quality inspection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N2013/0074—Stereoscopic image analysis
    • H04N2013/0085—Motion estimation from stereoscopic image signals

Definitions

  • the present invention relates to the technical field of digital image processing, and particularly relates to a method for acquiring a comfort degree of a motion-sensing binocular stereoscopic video.
  • binocular stereoscopic images and videos are stereoscopic media formats which are widely studied and used.
  • Binocular stereoscopic technology is used for achieving stereoscopic imaging by displaying different images to left and right eyes on a screen. Due to view angle-focusing mismatch in the imaging technology, when watching binocular stereoscopic videos, people will generate different degrees of discomfort. This discomfort is an important problem in the existing binocular stereoscopic technology, therefore, in order to prevent people from generating severe discomfort and even being incapable of performing binocular stereoscopic fusion when watching the binocular stereoscopic videos, how to measure the comfort degree of the binocular stereoscopic videos has important research and practical significance.
  • a traditional binocular stereoscopic imaging principle research discloses some factors resulting in discomfort of human eyes and influencing binocular stereoscopic imaging in an experiment mode.
  • Related researches indicate that binocular stereoscopic parallax and object movement speed have great influence on the discomfort degree, the larger the binocular stereoscopic parallax is, and the larger the object movement speed is, the larger the discomfort degree is, but related work in the existing binocular vision field mainly focuses on the qualitative relation description of these factors and lacks quantitative relation analysis, thereby failing to be directly used in practical engineering.
  • 2012 Jung et al.
  • the technical problem to be solved in the present invention is how to provide a method which can be used for calculating a discomfort degree when observing a binocular stereoscopic video according to change of an object movement speed and a parallax in the binocular stereoscopic video.
  • the present invention provides a method for acquiring a comfort degree of a motion-sensing binocular stereoscopic video.
  • the method includes the following steps: S 1 . carrying out binocular parallax and movement speed analysis on an input binocular video, and calculating a binocular parallax d, a movement speed vxy in a visual plane direction and a movement speed vz in a depth direction of each pixel point in the video; S 2 . calculating a corresponding comfort degree value c according to the parameters (d, vxy, vz) of the pixel point; S 3 . calculating the comfort degree value of the entire frame according to the calculated comfort degree value of each pixel point; S 4 . calculating the comfort degree value of the entire video according to the comfort degree value of each frame.
  • the step S 1 includes: at first, calculating the binocular parallax value at each pixel point according to the binocular video by binocular matching, and then calculating the movement speed vxy in the visual plane direction and the movement speed vz in the depth direction of each pixel point by using light stream.
  • the step S 2 includes: calculating the comfort degree value c at the pixel point according to the parameters (c, vxy, vz) calculated in the step S 1 , in accordance with experimental fitting comfort degree calculation formulae:
  • a comfort degree value corresponding to a pixel with the lowest comfort degree value in each frame is used as the comfort degree value of the frame by using a conservative estimation strategy.
  • a median of the comfort degree values of all frames is used as the comfort degree value of the entire video.
  • the comfort degree of the binocular stereoscopic video is calculated according to the steps in the present invention, so that influence of positive and negative depth ranges and object movement on the comfort degree can be well considered to obtain more accurate estimation of the comfort degree.
  • FIG. 1 is a schematic diagram of a flow of a method for acquiring a comfort degree of a motion-sensing binocular stereoscopic video according to an embodiment of the present invention.
  • FIG. 1 it is a flowchart of the method in the present invention.
  • Input data is a binocular stereoscopic video
  • output is an estimated value of the comfort degree of the binocular stereoscopic video. Steps expressed in the FIGURE are as follows:
  • S 1 calculating parameters of pixel points in the video: analyzing input left and right binocular videos, calculating a binocular parallax d at each pixel point by using a binocular matching algorithm, and then calculating a movement speed vxy in a visual plane direction and a movement speed vz in a depth direction of the pixel point in a continuous frame by using a light stream algorithm;
  • the method for acquiring the comfort degree of the motion-sensing binocular stereoscopic video provided by the present invention can be used for effectively calculating the comfort degree of the binocular stereoscopic video and well considering the influence of positive and negative depth ranges and object movement on the comfort degree to obtain more accurate estimation of the comfort degree.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Image Analysis (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

The present invention discloses a method for acquiring a comfort degree of a motion-sensing binocular stereoscopic video. The method includes the following steps: S1. carrying out binocular parallax and movement speed analysis on an input binocular video, and calculating a binocular parallax d, a movement speed vxy in a visual plane direction and a movement speed vz in a depth direction of each pixel point in the video; S2. calculating a corresponding comfort degree value c according to the parameters (d, vxy, vz) of the pixel point; S3. calculating the comfort degree value of the entire frame according to the calculated comfort degree value of each pixel point; S4. calculating the comfort degree value of the entire video according to the comfort degree value of each frame. The comfort degree of the binocular stereoscopic video is calculated according to the steps in the present invention, so that influence of positive and negative depth ranges and object movement on the comfort degree can be well considered to obtain more accurate estimation of the comfort degree.

Description

    TECHNICAL FIELD
  • The present invention relates to the technical field of digital image processing, and particularly relates to a method for acquiring a comfort degree of a motion-sensing binocular stereoscopic video.
    • BACKGROUND
  • In the field of computer graphics, binocular stereoscopic images and videos are stereoscopic media formats which are widely studied and used. Binocular stereoscopic technology is used for achieving stereoscopic imaging by displaying different images to left and right eyes on a screen. Due to view angle-focusing mismatch in the imaging technology, when watching binocular stereoscopic videos, people will generate different degrees of discomfort. This discomfort is an important problem in the existing binocular stereoscopic technology, therefore, in order to prevent people from generating severe discomfort and even being incapable of performing binocular stereoscopic fusion when watching the binocular stereoscopic videos, how to measure the comfort degree of the binocular stereoscopic videos has important research and practical significance.
  • A traditional binocular stereoscopic imaging principle research discloses some factors resulting in discomfort of human eyes and influencing binocular stereoscopic imaging in an experiment mode. Related researches indicate that binocular stereoscopic parallax and object movement speed have great influence on the discomfort degree, the larger the binocular stereoscopic parallax is, and the larger the object movement speed is, the larger the discomfort degree is, but related work in the existing binocular vision field mainly focuses on the qualitative relation description of these factors and lacks quantitative relation analysis, thereby failing to be directly used in practical engineering. In 2012, Jung et al. proposed a method for calculating a discomfort degree based on binocular parallaxes and movement speeds by experiments, but the method is used for independently experimenting and analyzing the binocular parallaxes and movement speeds in different directions in an experiment without considering the mutual relation of these factors, and the calculation method does not involve distinguishing of positive and negative binocular parallaxes. We model an overall parameter space of the binocular parallaxes and three-dimensional object movement speeds to obtain a more accurate and universal calculation method.
    • SUMMARY (1) Technical Problem to be Solved
  • The technical problem to be solved in the present invention is how to provide a method which can be used for calculating a discomfort degree when observing a binocular stereoscopic video according to change of an object movement speed and a parallax in the binocular stereoscopic video.
    • (2) Technical Solution
  • To solve the above problem, the present invention provides a method for acquiring a comfort degree of a motion-sensing binocular stereoscopic video. The method includes the following steps: S1. carrying out binocular parallax and movement speed analysis on an input binocular video, and calculating a binocular parallax d, a movement speed vxy in a visual plane direction and a movement speed vz in a depth direction of each pixel point in the video; S2. calculating a corresponding comfort degree value c according to the parameters (d, vxy, vz) of the pixel point; S3. calculating the comfort degree value of the entire frame according to the calculated comfort degree value of each pixel point; S4. calculating the comfort degree value of the entire video according to the comfort degree value of each frame.
  • Preferably, the step S1 includes: at first, calculating the binocular parallax value at each pixel point according to the binocular video by binocular matching, and then calculating the movement speed vxy in the visual plane direction and the movement speed vz in the depth direction of each pixel point by using light stream.
  • Preferably, the step S2 includes: calculating the comfort degree value c at the pixel point according to the parameters (c, vxy, vz) calculated in the step S1, in accordance with experimental fitting comfort degree calculation formulae:

  • c=−0.0556*vxy−0.6042*vz+0.0191*vxy*vz+0.0022*d*vxy+0.1833*d*vz−0.6 932*d+4.6567(d>=0),

  • c=−0.0556*vxy−0.6042*vz+0.0191*vxy*vz−0.0043*d*vxy−0.1001*d*vz+0.2 303*d+4.6567 (d<0).
  • Preferably, in the step S3, a comfort degree value corresponding to a pixel with the lowest comfort degree value in each frame is used as the comfort degree value of the frame by using a conservative estimation strategy.
  • Preferably, in the step S4, for a sequence frame in the video, a median of the comfort degree values of all frames is used as the comfort degree value of the entire video.
    • (3) Beneficial Effects
  • The comfort degree of the binocular stereoscopic video is calculated according to the steps in the present invention, so that influence of positive and negative depth ranges and object movement on the comfort degree can be well considered to obtain more accurate estimation of the comfort degree.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a schematic diagram of a flow of a method for acquiring a comfort degree of a motion-sensing binocular stereoscopic video according to an embodiment of the present invention.
    •  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • A further detailed description of the specific implementations of the present invention will be given below in combination with the accompanying drawings and the embodiments. The following embodiments are merely used for illustrating the present invention, rather than limiting the scope of the present invention.
  • See FIG. 1, it is a flowchart of the method in the present invention. Input data is a binocular stereoscopic video, and output is an estimated value of the comfort degree of the binocular stereoscopic video. Steps expressed in the FIGURE are as follows:
  • S1. calculating parameters of pixel points in the video: analyzing input left and right binocular videos, calculating a binocular parallax d at each pixel point by using a binocular matching algorithm, and then calculating a movement speed vxy in a visual plane direction and a movement speed vz in a depth direction of the pixel point in a continuous frame by using a light stream algorithm;
  • S2. calculating a comfort degree value at the pixel point according to formulae: substituting the above calculated parameters in the following formulae to calculate the comfort degree value c at the pixel point:

  • c=−0.0556*vxy−0.6042*vz+0.0191*vxy*vz+0.0022*d*vxy+0.1833*d*vz−0.6932*d+4 0.6567(d>=0),

  • c=−0.0556*vxy−0.6042*vz+0.0191*vxy*vz−0.0043*d*vxy−0.1001*d*vz+0.2303*d+4 0.6567(d<0);
  • S3. calculating the comfort degree of the image frame: according to the comfort degree value at each pixel point calculated in the above step, adopting a conservative strategy to use the comfort degree value of a pixel point with the lowest comfort degree value in the frame as the comfort degree value of the image frame;
  • S4. calculating the comfort degree of the entire video: according to the comfort degree value of each image frame calculated in the above step, using a median of all numerical values as the comfort degree value of the entire video.
  • By means of the description of the specific embodiments of the present invention in combination with the accompanying drawings, other aspects and features of the present invention are apparent to those skilled in the art.
  • The above descriptions are merely preferred implementations of the present invention, it should be noted that those of ordinary skill in the art can make a variety of improvements and substitutions on the premise of not deviating from the technical principle of the present invention, and these improvements and substitutions should be encompassed within the protection scope of the present invention.
    • INDUSTRIAL APPLICABILITY
  • The method for acquiring the comfort degree of the motion-sensing binocular stereoscopic video provided by the present invention can be used for effectively calculating the comfort degree of the binocular stereoscopic video and well considering the influence of positive and negative depth ranges and object movement on the comfort degree to obtain more accurate estimation of the comfort degree.

Claims (8)

1. A method for acquiring a comfort degree of a motion-sensing binocular stereoscopic video, comprising the following steps:
S1. carrying out binocular parallax and movement speed analysis on an input binocular video, and calculating a binocular parallax d, a movement speed vxy in a visual plane direction and a movement speed vz in a depth direction of each pixel point in the video;
S2. calculating a corresponding comfort degree value c according to the parameters (d, vxy, vz) of the pixel point;
S3. calculating the comfort degree value of the entire frame according to the calculated comfort degree value of each pixel point;
S4. calculating the comfort degree value of the entire video according to the comfort degree value of each frame.
2. The method of claim 1, wherein the step S1 comprises: at first, calculating the binocular parallax value at each pixel point according to the binocular video by binocular matching, and then calculating the movement speed vxy in the visual plane direction and the movement speed vz in the depth direction of each pixel point by using light stream.
3. The method of claim 1, wherein the step S2 comprises: calculating the comfort degree value c at the pixel point according to the parameters (d, vxy, vz) calculated in the step S1, in accordance with experimental fitting comfort degree calculation formulae:

c=−0.0556*vxy−0.6042*vz+0.0191*vxy*vz+0.0022*d*vxy+0.1833*d*vz−0.6932*d+4.6567(d>=0),

c=−0.0556*vxy−0.6042*vz+0.0191*vxy*vz−0.0043*d*vxy−0.1001*d*vz+0.2303*d+4.6567(d<0).
4. The method of claim 3, wherein in the step S3, a comfort degree value corresponding to a pixel with the lowest comfort degree value in each frame is used as the comfort degree value of the frame by using a conservative estimation strategy.
5. The method of claim 4, wherein in the step S4, for a sequence frame in the video, a median of the comfort degree values of all frames is used as the comfort degree value of the entire video.
6. The method of claim 2, wherein the step S2 comprises: calculating the comfort degree value c at the pixel point according to the parameters (d, vxy, vz) calculated in the step S1, in accordance with experimental fitting comfort degree calculation formulae:

c=−0.0556*vxy−0.6042*vz+0.0191*vxy*vz+0.0022*d*vxy+0.1833*d*vz−0.6932*d+4.6567(d>=0),

c=−0.0556*vxy−0.6042*vz+0.0191*vxy*vz−0.0043*d*vxy−0.1001*d*vz+0.2303*d+4.6567(d<0).
7. The method of claim 6, wherein in the step S3, a comfort degree value corresponding to a pixel with the lowest comfort degree value in each frame is used as the comfort degree value of the frame by using a conservative estimation strategy.
8. The method of claim 7, wherein in the step S4, for a sequence frame in the video, a median of the comfort degree values of all frames is used as the comfort degree value of the entire video.
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CN111652922A (en) * 2020-06-04 2020-09-11 江苏天宏机械工业有限公司 Monocular video depth estimation method and system based on binocular vision

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CN111652922A (en) * 2020-06-04 2020-09-11 江苏天宏机械工业有限公司 Monocular video depth estimation method and system based on binocular vision

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